Doorbell



FIG. 1 is a front, side, and top perspective view of a doorbell embodying the new design;

FIG. 2 is a back, side, and bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a first side view thereof

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines depict portions of a doorbell in which the design is embodied and form no part of the claimed design. The broken line forming an outer edge line at the back portion of a doorbell (e.g., broken line shown in FIGS. 5-6) represents the boundary of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only. 

CLAIM The ornamental design for a doorbell, as shown and described. 